1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/types.h> 3 #include <linux/errno.h> 4 #include <linux/uaccess.h> 5 6 #include <asm/sfp-machine.h> 7 #include <math-emu/soft-fp.h> 8 #include <math-emu/double.h> 9 #include <math-emu/single.h> 10 11 int 12 lfs(void *frD, void *ea) 13 { 14 FP_DECL_D(R); 15 FP_DECL_S(A); 16 FP_DECL_EX; 17 float f; 18 19 #ifdef DEBUG 20 printk("%s: D %p, ea %p\n", __func__, frD, ea); 21 #endif 22 23 if (copy_from_user(&f, ea, sizeof(float))) 24 return -EFAULT; 25 26 FP_UNPACK_S(A, f); 27 28 #ifdef DEBUG 29 printk("A: %ld %lu %ld (%ld) [%08lx]\n", A_s, A_f, A_e, A_c, 30 *(unsigned long *)&f); 31 #endif 32 33 FP_CONV(D, S, 2, 1, R, A); 34 35 #ifdef DEBUG 36 printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c); 37 #endif 38 39 if (R_c == FP_CLS_NAN) { 40 R_e = _FP_EXPMAX_D; 41 _FP_PACK_RAW_2_P(D, frD, R); 42 } else { 43 __FP_PACK_D(frD, R); 44 } 45 46 return 0; 47 } 48